package com.example.demovalue.pk2readconfig;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Service;

@Service
public class ReadConfig {
    // 注入环境变量
    @Autowired
    private Environment environment;

    public void print() {
        // 获取某个key的值
        String name = environment.getProperty("app.name");

        // 判断key是否存在
        if ( environment.containsProperty("app.owner")) {
            System.out.println("app.owner是存在的");
        }

        // 读取key的值，转为期望的类型，同时提供默认值
        Integer port = environment.getProperty("app.port", Integer.class,9001);

        String str = String.format("读取的key值，name=%s，port=%d", name, port);
        System.out.println("str = " + str);
    }
}
